I asked some questions about creating a stable economy that uses mana as currency.
I'm stuck on a new problem trying to use it, why is there so much mana circulating in the economy already? I want mana generation vs use to have reached a roughly even level, nearly as much mana is being used by mages as is being added to the economy, possible with some slight fluctuation or minor inflation. I also want this to be the sole currency of a country, meaning that there is enough mana out there to be being used for trade and barter between non mages. This implies a huge quantity of mana in reserve within the economy being used primarily as currency instead of as spell fuel. Finally I want the total amount of mana that a human produces in a day to be worth noticeable less then the cost of room and board, ie one still needs to work to earn money not just fill up mana coins to cover the cost of their survival.
The question is how did we get so much mana in the economy? At some point in the past people would have figured out how to store mana and trade it, at which point you would expect mages to start buying it up and using it. At some point supply and demand should have equalized with mana used as fast as it was created, and it seems like that point would have happened long before we had such a huge excess of unused mana stock piled in the economy.
In short mana seems more like it would naturally become a commodity, to be bought and sold using some other currency. If there was enough unused mana available it could have been used as a currency, but it doesn't seem like that large an excess supply should have been created for there to be enough available to meet the demands as a stable currency. Why weren't mages buying up and using all the excess mana before we collected such a large economic reserve?